GP2021 Datasheet, PDF (58/62 Pages) Mitel Networks Corporation – GPS 12 channel Correlator Advance Information

GP2021
WREN
wcIwcA
NCS
READ
ALE_IP
A<9:2>
D<15:0>
rdVwcA
wcIalL
alHalL
rdIwcA
adValL
alLadI
ADDRESS
VALID
wcAdaV
wcIdaZ
DATA
VALID
Fig. 39 : Motorola mode read, ALE_IP non-overlapping WREN and NCS (NARMSYS = 1, NINTELMOT = 1, WRPROG = X)
Timing Parameter Description
WREN or NCS Inactive to WREN and NCS active
ALE_IP High to ALE_IP Low pulse width
WREN or NCS Inactive to ALE_IP Low Hold off time
Address Valid to ALE_IP Low setup time
ALE_IP Low to Address Invalid Hold time
READ Valid to WREN and NCS Active setup time
WREN and NCS Active to READ Invalid Hold time
WREN or NCS Active to DATA valid
WREN or NCS Inactive to DATA High impedance
Symbol
τ_wcIwcA
τ_alHalL
τ_wcIalL
τ_adValL
τ_alLadI
τ _rdVwcA
τ_wcArdI
τ_wcAdaV
τ_wcIdaZ
Min
Max
23
13
23
9
8
7
5
44
4
23
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
Notes
1
1
1, 2
1, 2
1
1
Notes: 1 WREN is active High, NCS is active Low.
2 READ is transparently latched by WREN and NCS being active.
3 There is no parameter specified for WREN or NCS Inactive to ALE_IP High, since the internal ALE signal is
disabled until after the end of the internal Read or Write Strobe; hence the need for the τ_wcIalL parameter.
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